:root{
    --primary:#111827;
    --secondary:#6b7280;
    --accent:#2563eb;
    --bg:#ffffff;
    --card:#f8fafc;
    --border:#e5e7eb;
}

.dark{
    --primary:#f9fafb;
    --secondary:#9ca3af;
    --accent:#60a5fa;
    --bg:#0f172a;
    --card:#1e293b;
    --border:#334155;
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Inter,Segoe UI,sans-serif;
    background:var(--bg);
    color:var(--primary);
    line-height:1.6;
    transition:.3s;
}

.container{
    width:min(1200px,90%);
    margin:auto;
}

/* NAVBAR */

nav{
    position:sticky;
    top:0;
    z-index:100;
    background:rgba(255,255,255,.9);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
}

.dark nav{
    background:rgba(15,23,42,.9);
}

.nav-content{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:1rem 0;
}

.logo{
    font-size:1.4rem;
    font-weight:700;
}

.logo span{
    color:var(--accent);
}

.nav-links{
    display:flex;
    gap:1.5rem;
}

.nav-links a{
    text-decoration:none;
    color:var(--primary);
}

.toggle{
    cursor:pointer;
    padding:.5rem 1rem;
    border:none;
    background:var(--accent);
    color:#fff;
    border-radius:8px;
}

/* HERO */

.hero{
    padding:100px 0;
    text-align:center;
}

.hero h1{
    font-size:clamp(2.5rem,5vw,5rem);
    margin-bottom:20px;
}

.hero p{
    max-width:700px;
    margin:auto;
    color:var(--secondary);
    font-size:1.1rem;
}

.hero-btn{
    display:inline-block;
    margin-top:30px;
    padding:14px 28px;
    background:var(--accent);
    color:#fff;
    text-decoration:none;
    border-radius:10px;
}

/* SEARCH */

.search-box{
    margin:50px auto;
    max-width:500px;
}

.search-box input{
    width:100%;
    padding:15px;
    border:1px solid var(--border);
    border-radius:10px;
    background:var(--card);
    color:var(--primary);
}

/* BLOGS */

.section-title{
    text-align:center;
    margin-bottom:40px;
    font-size:2rem;
}

.blog-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:25px;
}

.card{
    background:var(--card);
    border:1px solid var(--border);
    padding:25px;
    border-radius:16px;
    transition:.3s;
}

.card:hover{
    transform:translateY(-5px);
}

.card h3{
    margin-bottom:10px;
}

.card p{
    color:var(--secondary);
    margin-bottom:15px;
}

.tag{
    display:inline-block;
    padding:5px 12px;
    background:rgba(37,99,235,.1);
    color:var(--accent);
    border-radius:30px;
    font-size:.8rem;
}

/* AI SECTION */

.ai-section{
    margin:100px 0;
}

.ai-box{
    background:linear-gradient(
        135deg,
        rgba(37,99,235,.08),
        rgba(99,102,241,.08)
    );
    padding:30px;
    border-radius:16px;
    border:1px solid var(--border);
}

.ai-box ul{
    margin-top:15px;
    padding-left:20px;
}

/* ABOUT */

.about{
    margin:100px 0;
}

.about p{
    max-width:800px;
    margin:auto;
    text-align:center;
    color:var(--secondary);
}

/* NEWSLETTER */

.newsletter{
    text-align:center;
    margin:100px 0;
}

.newsletter form{
    display:flex;
    gap:10px;
    justify-content:center;
    flex-wrap:wrap;
    margin-top:20px;
}

.newsletter input{
    padding:14px;
    min-width:280px;
    border:1px solid var(--border);
    border-radius:10px;
}

.newsletter button{
    padding:14px 24px;
    border:none;
    border-radius:10px;
    background:var(--accent);
    color:#fff;
    cursor:pointer;
}

/* FOOTER */

footer{
    text-align:center;
    padding:30px;
    border-top:1px solid var(--border);
    color:var(--secondary);
}

/* MOBILE */

@media(max-width:768px){

    .nav-content{
        flex-direction:column;
        gap:15px;
    }

    .nav-links{
        flex-wrap:wrap;
        justify-content:center;
    }

    .hero{
        padding:70px 0;
    }

    .hero h1{
        font-size:2.5rem;
    }
}